Stone-dressing machine



(No Model.)

n e e h m e e h S 2 M HM FR, RD m W0 T No. 600,989. Patented Mar. 22,1898.

THE NDRRIS vzrzns co, PHOTO-LITHO.. wnsmucfl'on, D. c.

(No Model.) 2 Sileets-Sfieet 2.

- W. R. HINSDALE.

STONE DRESSING MACHINE.

.N0; 60 0,989-. Patented Mar. 22, 1898.

W IIII UNITED STATES PATENT OFFICE.

WILLIAM R. HINSDALE, OF EVANSTON, ILLINOIS.

STONE- DRESSING MACHINE.

SPECIFICATION formingpart of Letters Patent No. 600,989, dated March 22, 1898.

Application filed March 1897. Serial No. 626,129. (No model.)

To all whom it map concern.-

Be it known that I, WILLIAM R. HINSDALE, of Evanston, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Stone Dressing Machines; and I do hereby declare that the-followingis a full, clear, and exact description thereof, reference being had to .the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in stone-dressing machines, but is peculiarly adapted for the cutting or dressing of granite or other exceedinglyhard stone,and will therefore be illustrated and described in connecan improved tool-holder adapted to be at tached to a planer which is provided with a suitable motor thereon for imparting a succession of blows to the tool, said tool-holder being so constructed as to hold the tool in such manner that the effect of the blows upon said tool will be in all respects like, that imparted by a hand instrument.

The invention consists in the matters hereinafter set forth, and more particularly pointed outin the appended claims.

Figure 1 of the drawings'illustrates in a front elevation, partially in-perspective, a

planer embodying my invention with a block of granite or other stone secured upon the bedplate or table of the machine. Fig. 2 is an enlargedsectional view of the cross-head of the planer, taken upon the line 2 2 of Fig. 1, and thus showing the tool-holder and tool-hammer apparatus in side elevation. Fig. 3 is a front View similar to that of Fig. 1, but enlarged, showing more clearly the tool-holder head, thetool-hammering apparatus being removed. Fig. 4 isa transverse sectional view taken cross-head O, and having also mounted in said cross-head a feed-screw c. The construction and operation of such a planer is considered so obvious and well known to the trade that further detailed description of its construction or operation will be omitted. Mounted upon said cross-head O is a frame G, provided with a suitable lug or screw engaging device 0 and with guide-flanges c 0 whereby upon the rotation of the feed-screw c the frame 0 will be moved lengthwise of the cross-head C and transversely across the bed-plate B in the desired direction and the desired distance.

Upon its front face is secured a vertical movable plate D, to which the tool-holder E is pivotally secured. The plate D is mounted upon the frame 0' by a familiar dovetail tongueand-groove connection d d, Fig. 4.

A vertical feed-screw 0 secured in the upper end of the frame C, engages the plate D and serves as a means for regulating the vertical adjustment of the plate D and the devices carried thereon. A pair of lugs d extend to the front at each margin of the plate D and are provided with lateral openings through which a bolt D passes for the purpose of pivotally securing the tool-holder E to the plate D between said flanges d, there being of course a similar aperture through.

the lug e of the tool-holder E, registering with the apparatus in the lugs d. In the lower end of the plate Djs a screw-threaded aperture d in which an adjusting screw or bolt D is secured, the head of said bolt projecting beyond the front surface of the plate D a desired distance. In order to adjust the angle of the tool F, the rear face of the toolholder E rests against said adj usting-bolt D as clearly shown in Figs. 2 and 5. When, therefore, it is desired to change the angle of the tool F, the bolt D is turned in the de- ICO sired direction to the right or left. When it is desired to adjust the height of the toolholder E, the adjusting-screw C is turned to the right or left in the desired direction, and when it is desired to move the tool laterally of the bed-plate the adjusting-screw cis turned in the desired direction.

The lower end of the tool-holder is relatively thicker than its upper portion, thus forming a shoulder on the line indicated at e. In the thickened portion of said toolholder E and extendinglongitudinallytherethrough is a tool-holding space shown in all the figures of the drawings as being occupied by the tool F, said space or recess being of such depth as to accommodate the tool to be used, which latter does not extend above, but is flush with the outer surface of the toolholder E. A confining-cap E serves to hold the tool in position. This cap E may be secured to the tool-holder E at one end by an ordinary hinged connection, as indicated at 6 and at the other end by the bolts 6 or otherwise.

The cutting-tool F is provided in its end adjacent to its cutting edge with one or more apertures or slots f therethrough.

f is a screw-bolt secured in a suitable aperture in the cap-plate E and provided on its inner end with a reduced uuthreaded portion f constituting a bolt proper. This pin or bolt portion f passes through one of the slots fof the tool F, and its inner end rests in a suitable aperture in the face of the thick ened portion of the tool-holder E, as more clearly shown in Fig. 5. Surrounding the tool and resting upon the shoulder e of the tool-holder E is a buffer 1 which may be of rubber or other suitable resilient material, and immediately above and resting upon said buffer F is a steel plate or cap F Said tool is provided adjacent to the end thereof opposite its cutting edge with one or more apertures f and a pin F rests in one of said apertures and extends beyond the tool on both sides thereof. Said pin forms in effect astop or shoulder on said tool, between which and a shoulder on the tool-holder rests said buffer F and the plate F Said pin F rests in contact with the upper surface of the plate F so that the buffer F acts to hold the tool with which the pin is engaged normally in its uppermost position, or in that position in which the guidepin f engages the outer or lower end of the slotf in the outer end of the tool.

It will be manifest from an examination of the drawings, together with the above description, that the construction described is one wherein a reciprocating motion may be given to the tool F. The outward or cutting motion of said tool is limited by whatever compression there may be in the buffer F, the actual movement being in fact very slight, while the inward or retracting movement of the tool is limited by the pin f, engaging the outer or lower end of one of the slots f at the outer end of the tool. In Fig. 5 of the drawings the tool is shown in its retracted position, with its point f engaging the surface of a granite block. The apertures f engaged by the pin F are shown as slotted or of 0blong form; but it will be understood that this form of aperture is not essential to the operation of the tool. As before stated, said pin forms a stop or shoulder on the tool by which the movement of the tool is controlled by the buffer, and the pin will in practice be of such size as to entirely fill the aperture in which it is mounted. Said tool will be provided with a plurality of apertures f in order to provide for adjusting the tool in the holder when the cutting edge thereof has become worn, so that it will not reach the surface of the granite block. IVhcn this occurs, the pin F will be changed to the next adjacent aperture toward the rear orinner end of the tool, the guide-apertures f being also shifted downwardly, so that the guidepin f will engage the next adjacent guideslot.

In the accompanying drawings I have illustrated a steam-engine cylinder so connected. In said drawings, ll. is a frame provided at its lower end with. a pair of laterally-extending arms h, from the end of each of which projects upwardly a flange h, by which latter the frame is secured to an extension c of the tool-holder E by bolts 71 or other suitable means. The upper end 7r of the frame 11 is integral with the two main or vertical portions; but this is not strictly necessary.

Upon the frame II is secured a steam-cylinder generally provided interiorly with the usual piston-rod i and hammer-head t", the latter being in such position that when extended it will strike the upper end or head f of the cutting-tool F. The usual inlet and exhaust ports i are provided, and the inletport is connected with a suitable source of steam-supply by means of a flexible conduit 2' or in any other suitable manner. Preferably the cylinder I is adjustably mounted on the frame II, and this is accomplished by means of an integral cross-head or enlarged lug I, slidingly fitted between the proximate edges of the two vertical or main members of the frame II, and which guide-lug or crosshead I engages an adjusting-screw J, which is passed through a suitable aperture in the enlarged upper portion h of the frame and is operated in a familiar manner by a crank 3' or otherwise.

It will be apparent that upon operating the steam-hammer i the latter will deliver a series of successive strokes or blows upon the upper endf' of the cutting-tool F, the hammering blow on the tool driving it down upon the granite surface in precisely the same manner as the blow is delivered by the hand of the workman, the blow being cushioned by the buffer F, and it will also be apparent that the stroke being uniform repeated blows will have the result of giving a finished surface to the granite or other hard stone being operated upon, the tool being operated by the feedscrew 0 to a new position after each alternate stroke or otherwise, as desired, and thus ultimately covering the entire surface of the stone. c

I have found in practice that a machine constructed in accordance with the foregoing description produces work of a superior quality, and that the cutting-tool, instead of taking off the roughened portions of the granite by a rubbing or planing action, now removes them by precisely the same hammering action obtained in handwork; that the work is more uniform and at the same time more rapidly performed. The tool does not get out of order and holds its temper longer than the tools heretofore used in machines where the dressing of granite or other hard stones has been attempted.

What I claim is- 1. In a stone-dressing machine, the combination with a movable tool-holder, and a feed mechanism therefor, of a cutting-tool mounted to move longitudinally in said holder, a stop or shoulder on said tool, a buffer between said stop or shoulder and a shoulder on the holder, a guide-slot in said tool adjacent to its cutting edge, a guide-pin in said holder engaging said slot, means for shifting said stop or shoulder toward the rear end of the tool as the cutting edge of the tool is worn away, and a motor for delivering a succession of blows to the tool.

2. In combination with the frame of a stonedressing machine a traveling tool-holder, and a motor mounted on said tool-holder for delivering a succession of blows to the cuttingtool, of a cutting-tool movably secured in said tool-holder and provided near its upper end with a series of apertures, a pin or bolt passing through one of said apertures and extending on either side of the tool, and a buffer or other cushioning device located beneath said 4:. In a stone-dressing machine, the combination of a frame, a traveling tool-holder thereon, a cutting-tool movably mounted in said tool-holder and provided in its upper end I with one or more apertures, a pin or bolt pin and the outer end of the tool, a guide-pin passing through the lower end of the holder and engaging a guide-aperture in the tool, and a motor for imparting a successionof blows to said tool.

5. In a stone-cutting machine, the traveling tool holder comprising an adjustable frame portion, and a tool-holder pivotally and adjustably secured to said frame, said toolholder being relatively thick at its lower portion and provided with a recess in its face equal in depth to the thickness of the tool, and a cap or plate removably secured to the face of said lower thickened portion of the tool-holder, a tool positioned in said recess and provided with an elongated slotted opening therethrough, and a pin passing through a suitable aperture in said cap-plate and said opening in the tool and secured at its inner end in a suitable recess in the face of the tool-holder by means of a screw-threaded connection at the outer end of said pin with a registering recess in the cap-plate.

6. In a stone-dressing machine, the combination with the main frame and a cross-head mounted thereon, of a tool-holder on said cross-head comprising an elongated plate provided in its lower portion with a tool-holding recess, a longitudinally-movable cutting-tool mounted in said recess, a hinged cap adapted to close said recess, a bolt in said cap adapted to engage a guide-slot in said tool, a shoulder on said tool near the upper end thereof, a buffer between said shoulder and the adjacent lower end of the tool-holder and means for imparting a succession of blows to said tool.

7. In a stone-cutting machine, the traveling tool holder comprising an adjustable frame portion, and a tool-holder pivotally and adjustably secured to said frame, said tool holder being relatively thick at its lower portion and provided with a recess in its face equal in depth to the thickness of the tool, and a cap or plate removably secured to the face of said lower thickened portion of the tool-holder, a tool positioned in said recess and provided with an elongated slotted opening therethrough, and a pin passing through a suitable aperture in said cap-plate and said opening in the tool and secured at its inner end in a suitable recess in the face of the tool-holder by means of a screw-threaded connection at the outer end of said pin with a registering recess in the cap-plate.

In testimony that I claim the foregoing as my invention I afliX my signature,in presence 'of two Witnesses, this 2d day of March, A. D.

WILLIAM R. HINSDALE. Witnesses:

TAYLOR E. BROWN, CHARLES G. MAsoN.

IOC 

